Typewriting machine



March 2 1926. o. PETERMANN TYPEWRITING MACHINE Filed ont. '21, 1922 4 sheets-sheet 1 March 2 A1926.

O. PETERMANN TYPEWRITING MACHINE Filed Oct. 2l, 1922 4 Slleets-Sheet. 2

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March 2 1926. 1,575,499 x o. PETERMANN TYPEWRITING MACHINE pq n Filed OCt. 21, 1922 4 SheZS-Sl'leefl 3 n Nlq my Gm.

March 2 1926.

O. PETERMANN -TYPEWRITING MACHINE Filed Oct. 2l, 1922 4 Sheets-Sheet 4 1N VENTOR i 0&0 Apalier/mun n; fQaA/QJ/Q A TTORNEYS Patented Maf. z, 192e..

UNITED stares Param orricn.

OTTO PETERMANN, F GBOTON, NEW YORK, ASSIGNOR TQ COBGNA TYPEWBITER. (10M-v PAJN'Y, INC., 0F GROTQN, NEW YORK, A CORPORATION 0F NEW' YORK Tvrnwarrrn'e Encarna. l

Application led october 21, 1922.. SeralNo. 596,02.

To all whom it may concern.'

Be it known that I, Orro PETERMANN, a citizen of the United States, and resident of Groton, in the county of Tompkins and State of New York, have invented certain new and useful Improvementsin Typewriting Machines, of which the following' is a specification.

This invention relates to improvements in typewriting machines, and more particu larly to improvements in ribbon mechanism for such machines.

Generally stated, the objects of the invention are to provide ribbon feeding and 5 reversing mechanism ont simple construction an automatically reversing ribbon mechanism especially adapted for use on the aforesaid machine and4 which ma be embodied therein at low cost and wit a minimum of alteration of the construction and appearance of said machine.

In the accompanying drawings:

Figure 1 is a vertical sectional view of a Corona machine provided with the improved ribbon mechanism, the parts being shown in positions occupied immediately before reversal of the feed to wind the ribbon on the right hand spool, said view being taken substantially centrally of the machine along a line extending from front to rear of the machine, and parts ofthe machine not necessary to a full understanding of the present invention being omitted;

Fig. 2 a view similar to Fig. 1 showing the operation of reversing the feed to wm the ribbon upon the right hand spool;

Fig. 3 a front view of the ribbon mecha- 'view through the right hand ribbon nism, the parts being shown `in the positions occupied thereby at the instant et roversal oit the feed to wind the ribbon on the lei't hand spool;

Fig. 4 a fragmentary .front view showing the parts in the positions occupied thereI by in Fig. 2;

Fig. 5 a detail plan view, the positions of the parts of the reversing mechanism being 'the same as shown in Figs. 2 and l1;

Figs. 6 and 7 are detail perspective views of parts of the reversing mechanism ad jacent the left and right hand spools, re spectively, the parts being in the positions shown in Figs. 2, l and 5;

Fig. 8 a detail pers ective view of the supportingmeans for t e right hand spool and parts of the feeding and reversing means associated therewith;

Fig. 9 a perspective view of the bellcrank key-shifted reversing lever associated with the right hand spool;

Fig. 10 a iti-ont view (partly in section) of the bell-crank lever shown in. Fig. 9 showing its pivotal connection with the bracket illustrated in Fig. 8; j

Fig. 11 a bottom plan view showin the right hand end of the universal roc g' iti-ame and the hook device thereon' for actuating the reversing lever associated with the right hand spool;

Fig. 12 a vertical fore and aft sectional ooi looking toward the left side of the mac ine: the parts being in the position shown in Fig. 1;

Fig.` 13 a section on the line 13-13 of Fig.- 12; and

Fig. 14 a side elevation of one of the spool and gear shifting yokes.

Referring to the parts by numerals, 1.

designates the base or main frame art of the Corona machine before refe to, 2 designates the pair of vertically shifts-ble posts slidably held in the guide brackets 3 secured to the main frame part, 4 designates the pair of forwardly extending frame bars rigidly held to theupper ends of said posts and connected by the rod 5 at their rear ends, 6 designates the pair 'of folding arms pivotally held by pivot screws 37 at their forward ends'to the forward ends of bars 4 and carrying the bed 7 for the traveling platen carriage 8 at their rear ends, said arms 6 being'foldable forwardly and downwardly to place the bed 7, carriage 8 and platen 9 in acompacted inverted position over the keyboard. The posts 2 are connected at their' lower ends by a rod 10 and are movable vertically by shift key levers (not shown) to elevate the arins4, rod 5, and arms 6`and the parts carried thereby to two different positions for printing middie and upper case characters.

The three rows of printing key levers 11 are pivotallysupported intermediate their ends on different fulcrum rods 12 secured to the main frame and are connected by push links 13 to type bars 14- held to a pivot wire 15 in a segment 16 secured to the rear wall of the main frame. Each .printing key lever has a finger 17 underlying the transverse member of a universal bar 18 which is substantially U-shape in plan view and has its side arms pivotally `held intermediate their ends to `the rear fulcrum rod 12. The space bar 19 is supported on a pair of spacing levers 19 (one of which is shown in dotted lines pivotally supported in the main frame y a pivot rod 20 and engaging under the universal bar at their rear ends. The key levers 11, spacing levers 19, and the forward ends of the sidearms of the universal bar are returned tol normal position by springs 21 connected therewith and secured at their forward ends to a bracket 22 mounted in thernain frame.

A pair of upstanding levers 23, connected at their upper ends by a cross-bar 24, are pivotally held intermediate their ends to guide brackets 3 by pivot screws 25 to rock fore and aft of the machine, and the lower ends of said levers are connected by links 26 to the side arms of the universal bar. Levers 23 are provided with inwardly projecting lugs 27 at their upper ends engaging in vertical slots 28 in the side arms 29 of an upstanding sheet metal universal rocking frame of substantially U-shape, said side arms being connected by an integral `flat cross-bar 30 and being pivotally held at their lower ends to rod 10 to move vertically' therewith and swing thereabout fore and aft of the machine. When a printing key or the space-bar is depressed the universal bar is rocked upwardly and the upstanding universal rocking frame 29-30 is rocked rearwardly to cause a tappet 31 on cross-bar l30 of the rocking frame to actuate the escapinent-dog rocker of the Corona machine (not shown) and to cause a lug 32 on said crossbar to actuate the ribbon. vibrator of said machine, a part of which is shown at 33. The ribbon feed pawls 34 are pivotally held to eais 35 on said cross-bar 30 and the noses or free forward ends thereof are urged upwardly by springs 36 connected with the pawls and fingers 30n on bar 30. Said pawls are arranged to act on the forward or return movement of the rocking frame to feed the ribbon.

The foregoing parts are all` constructed and arranged as in the Corona machine referred to and the preferred new construction and arrangement of parts whereby the objects of the present invention are attained will now be described.

The inked ribbon 38 has attached thereto adjacent its opposite ends eyelets or other suitable abutment devices 39 and has its ends secured by resilient split clamping sleeves 42 to the tubular barrels 40'of the ribbon spools 41, which, as shown, are provided with heads or flanges only at their upper Jends. As the supports, the spool-rotating means, for each spool 41, and the devices for reversing the direction of rotation of the spools associated. with each spool 41, are duplicates, a detailed description of the means for supporting, rotating, and reversing the direction of the rotation of the right hand spool only will be given.

A sheet metal bracket has its flat central portion 43elongated fore and aft of the malchine and seated en the top of the right hand folding arin 6. A pair of screws 44 passed through said central portion 43 and threaded into arm 6 serve to detachably hold the bracket to the arm. A cylindrical vertically disposed metal post 45 has its enlarged lower end welded to portion 43 ofthe bracket adjacent the forward end of said portion. The bracket is formed with a Hat hoi'iaontally disposed angular arm 46 extending outwardly and forwardly and provided at its forward end with a bearing aperture 47 in a transverse plane forward of the plane of the posts 45. The apertured forward end of arm 46 is preferably raised slightly above the plane of thev main portion thereof as shown in Figs. 3 and 10.

Part 43 of the bracket is formed at its inner and outer edges with upturned ears 48 and 49 at the rear of post 45 provided with bearing apertures 50 in which a spool driving shaft 51 is journalled. A driving worm 52 is fixed on shaft 51 between ears 48 and 49 and a ratchet 53 is fixed on the inwardly projecting end of said shaft in position to be engaged by the adjacent feed pawl 34 when the machine is in normal operative or unfolded condition just as in said Corona machine. An arm 54 extends forwardly fr om ear 48, said arm being disposed edgewise in a vertical plane and havingV a horizoital slot 55 therein open at its forward en 2" Arm 54 and ear 49 are provided with hori- 1 A spool cup 58, having an axial opening 59 through which the post extends, is provided with two downwardly punched bosses 60 seated on lugs 56 and 57Y to support the bottom of the cup in a plane above the worm which is located therebeneath. An upward extension or cup-supporting lug 61 on ear 48 engages the bottom of the cup and assists in supporting the saine. rl`he cup is detaehably held to lugsl 56 and 57 by screws 62 having their heads countersunk in bosses 60.

The. metal hub 63 of a driven worin gear 64 is slidably and rotatably mounted on the reduced upper portion of post 45. lower end of hub 63 is adapted to seat on shoulder 65 on the post to support gear 64 in mesh with worin 52 and the upper end of the hub is adapted'to move up and down in aperture 59 in the cup.' said upper end of the hub being made sufficiently long to extend Hush with or slightly above the bottom of cup 58 when the lower end of the 4hub is seated on shoulder 65. The gear hub 63 is formed with a reduced vertically split tubular extension 66 of resilient metal the two halves of which have a normally upwardly and outwardly divergent set to form a spool barrel supporting and ing means or friction gripping post` 'lhe barrel 46 of spool 41 is forced downward over the beveled upper end of split post 66, compressing the 'divergent halves thereof, until its lower' end seats on shoulder' 67 at the upper end of the gear hub 63. rlhe spool is thus readily detachable but is held by friction sulliciently tightly to .prevent accidental rotary or endwise movements thereof relatively to the split post, so that the spool will revolve and move axially in unison with worm gear 64. The gear 64 is of greater diameter than the cup aperture 59 so that the gear and spool will not drop oftthe station-A ary guide post folded.

A U-shaped sheet metal gear-shifting yoke 68 has' its side arms extending rearwardly at opposite sides of post 45 and pivotally held to the worm shaft 51 between the ends of worm 52 and the shaft-bearing ears 48 and 49. rThe 4ilfront transverse bar of the sheet metal yoke 68 is provided with a raised port-ion or lug 69 midway its ends adapted to engage the under face of the worm gear 64 inside of its toothed perimeter and slide said gear and the ribbon spool axially upward to disconnect the gear 64 from worm 52.

Yole 68 is operated. by a sheet-metal bellcrank reversing lever having a transversely inwardly extending arm 70 located forward ot post 45 and guided adjace `t its inner end in slot 55 -in bracket arm 54., and a rearwardly extending arm 71 located outside ot bearing ear` 49 and extendiig through a The retain- 45 when the machine is guide slot 7 2 in an arm 7 3 extending outwardly from the bearing ear 49 on bracket- 48. The reversing lever has a bearing or pivot Stud 74 punched downward therefrom at the junction of arms 76 and 7l and held in the bearing aperture 47 in bracket arm 46 by a laterally bendable lug 75 turned up from the outer edge of the bracket arm and bent over the top face of the reversing lever closely adjacent the pivot stud. rlbe arm 7 0 of the reversing lever is formed with a widened yoke-supporting portion 70'L underlying thcminner side arm ot yoke 68 and provided with a slot or aperture 76 through which a depending cam or lug 77, formed on the lower edge of the inner side arxn of yoke 68. extends when arm 70 of the reversing lever is in its rearwardly shifted position. Lug 77 has a forwardly and downwardly inclined rear cam edge 77a adapted to readily ride up over the rear edge of slot 76 when arm 70 of the reversing lever is swung forwardly.

Arm 70 of the reversing lever is formed at its inner end with a depending ear 78.Y disposed in a vertical plane extending transversely of the machine, and la sheet metal upstanding ribbon-operated trip lever 79 is pivotally held midway its ends to the front face of said earby a screw 80. The lower end of lever 79 is normally held against a forwardly projecting stop lug 8l on ear 78 below pivot 80, by means of a weight 82 consisting ot a metal block welded to the lever 79 at the inner side of the path of movement of a forwardly and rearwardly movable sheet metal hook 84 carried by the universal rocking frame 29-30 so that the lever will not be engaged by the hook during rocking movements of said frame. A wire extension df lever 79 has its lower end slightly dattened and passed through superposedslots in the upper end of the lever and locked thereto against relative movement by hammering or pressing the interlocked parts to crimp the wire.- rlhe wire extension is doubled upon itself to form a ribbon guide loop 85 through which the ribbon 38 passes but through which the evelet 39 cannot pass. The rear ends of arms 71 of the bell-crank reversing levers are connected bv a wire link 86v extending transversely of the machinel Cil against the under face of bar 30 by a screw S7 thc shank of which passes through ashort slot 88 extending longitudinally lof the cross-bar and is screwed into part S4". of the hook. The screw 87 is adjustable along the slot to clamp part 84h to cross-bar 30 with the outer edge of said part abutting against the fiat inner face of side bar 29 otl the rocking frame so as to prevent turning of the hook about the screw.

At each depression of a printing key or the space-bar the universal barA 1S is rocked upwardly to rock the frame 29-30 rearwardly as shown in Fig. 2, and upon release of said l: y or lrar the frame returns to normal position as shown in Fig. 1, under the influence of the uuiversabbar return spring 2l. Hooks 84 move rearwardly and torwardly normally without engaging the trip levers, and pawls 34 rotate the ratchets part of al revolution on each return movement ot the frame 295-30 thus partly rotating both worms 52 in the same direction. Assuming the left hand spool and gear to 'be lowered and the right hand spbol and gear to be elevated, owing to rearward swinging of arm 70 of the leftfhand reversing lever and forward swinging of the arm 70 of the righthand lever by engagement of left hand hooi; 84 with left. hand trip lever 79 (as shown in Fig. 3), it will be obvious that the ribbon will be wound upon the left hand spool during succeeding key strokes, passing frointhe rear of the right hand spool around in front of the lett hand spool which will be rotated in clockwise direction by its gear 64 and worm 52. The right hand spool and'gear are held elevated by their shifter yoke 68 whose cam lug 77 is seated on top of part '70E of arm 70 of the reversing lever at the rear of slot 76, and whose lug 69 engages under and supports gear` 64 of the right hand vspool in elevated disconnected position, as shown in Figs. 3 and 12, so that said gear is free to rotate in counter-clockwise direction.

As the ribbon becomes exhausted from the right hand spool the eyelet near vthe right hand end of the ribbon engages wire guide loop 85 on the right hand trip lever 79 and rocks the lower end of the trip lever outward until it is in the path of the hook84. 0n

the next depression of a .key or the Spacebar the rearwardmovement or the frame 29-30 carries hooks 84 rearward and. the right hand hook 84 engages and\ ulls back the tripped lever and vthe arm 0 of the reversing lever upon which it is mounted, as shown in Fig. 2, causing the parts to assume the positions Shown in Figs. 4 to 7. The left hand yoke 68 is thus thrown upward to elevate the left hand gear 64 and its spool to disconnect said gear from the left hand worm.52, while the right hand yoke drops down onto its reversing lever\as cam lug 77 therecn drops through'slot 76 and the right hand gear and spool slide down their guide post 45 until the gear meshes with the right hand Worm 52 with its hub on shoulder 65. Lug 69 and shoulder 65 are preferably of such height that lug 69 will not engage gear 64 when the gear hub engages shoulder 65.

The movements ofthe reversing levers are limited by engagement of arms with the rear ends of slots 55 and the link connect' n 86 between the levers. Excessive tilting of levers 79, especially in folding the machine, is prevented by engagement of weights 82 with the under side of arms 70 of the reversing levers'. It will be observed that the reversal of the driving connections takes place while the ribbon and gears and worms are stationary, that. is, during the inactive rearward movement of feed pawls 34, and is accomplished by power applied to the keys or space bar. The flange of the spool cup is above the lower edge of the ribbon even when the spool is raised and each cup flange is cut away at the inner side of the cup at 89 to permit free passage of the ribbon to the guide loops on the trip levers. A ribbon-retaining fin er 90 is preferably pros vided on each cup ange extending up past the edge of the head of the spool 41.

lt will be observed that all parts of the ribbon-supporting, guiding, feeding, and reversing means, except pawls 34 and hooks 84, which are mounted on the rocking frame, fold with the platen carriage, and that operative connection is made and broken between the folding and non-folding parts by simply moving the `folding frame part of the Corona machine to Aor from extended normal operative position. The usual spring detentlingers for ratchets `53 employed in the Corona machine are shown at 91 and are secured at their forward ends to the cup supports 56.

What I claim is:

1. In a typewriting machine, the combination with an inking ribbon having" abutments near itsy ends and a pair of spools with which the ends thereof are connected, of a pair of driven members connected with the spools to rotate and move axially therewith, a, pair of stationary posts supporting said spools and driven members for rotary and axial movements, a y air of driving memv bers for rotating the driven members, means forsimultaneously shifting the driven mem 120 bers axially in yopposite directions to connectV one driven member with its driving member and disconnect the other driven member from its driving member, a pair of normally inactive trip devices mounted on the driven member shifting means and movable alternately by the abutments on the ribbon to active position, and universal keyoperated means for engaging a shifted trip deyvice to operate said drivenmember shifting terasse means to reverse the direction of feed of the ribbon.

2. In a ribbon feeding mechanism for writing machines, the combination with a pair of driving members and means for rotating the same at each printing operation of the machine, of a pair of driven members shitable axially into and ont of engagement With the driving members, a pair of ribbon spools connected to rotate with the driven members, an hiking ribbon connected at its ends With the spools, abntments on said ribbon near each end thereof, reversing means for shifting the driven members axially simultaneously in opposite directions, universal key-operated means vibrating at the key-strokes, and normally inactive devices shi-ttabie by said abutments alternately into the path ci movement of said key-operated means and connected with the reversing means to actuate 'the same when either oi said devices is moved by said hey-operated means.

3. In a ribbon feeding mechanism for Writing machines, the combination with a pair of driving members and ineans for rotating the same at each printing operation of the machine, of a pair of driven members shiftable axially into and out ot' engagement with the driving' members, a pair of ribbon spools connected to rotate with the driven members, an inking ribbon connected at its endsvvith the spools, abutments on said ribbon near each end thereof, a pair oit reversing levers pivotally supported to swing transversely of the axis of rotaticn of the driven members, a link connecting the levers, trip devices on the levers movable alternately into active position by the 'abutments on the ribbon, universal key-operated means adapted to engage the trip devices when in active position to swing` the levers alternately in opposite directions, and means, operable by the levers for shifting the driven members axially simultaneously in opposite directions.

4. In a ribbon feeding mechanism for Writing machines, the combination with a pair of driving members and means for rotatiner the same at each printing operation of the machine, of a pair of driven members shiftable axially into and out of engagement with the driving members, a pair of ribbon spools connected to rotate with the driven members, an inking ribbon connected at its ends With the spools, abutments on said ribbon near each end thereof, a pair of reversing levers pivotally supported intermediate their ends to swing transversely of the axis of rotation of the driven members, a link connecting the levers at one end, universal key-operated means for rocking the levers, a pair of normally inactive trip devices pivotal-ly mounted on the other ends of the levers and shiftable alternately by the abutments on the ribbon into the path of movement of the universal key-operated means, and means operated by the levers for shifting the driven members axially simultaneously in opposite directions.

5. ln a ribbon feeding mechanism for Writing machines, the combination with a pair of driving members and means for rotating the saine at each printing operation of the machine, of a pair of driven members shittable axially into and outl of engagement with the driving members, a pair o ribbon spools connected to rotate with the driven members, an inking ribbon connected at its ends with the spools, abiitments on said ribbon near each end thereof, a pair oi reversing levers pivotally supported intermediate their ends to swing transversely ot' the axis of rotation of the driven members, a link connecting the levers at one end, universal key-operated means for rocking the levers, a pair of normally inactive trip devices pivotally mounted on the other ends oi the levers andy shiftable alternately by the abutments on the ribbon into the path ot movement ot the universal hey-operated means, and apeir ot swinging members engaging the driven members to shift the same axially having c am surfaces engaged by the levers for moving the swinging members simultaneously in opposite directions.

6. In a typewriting machine, the combinatioii'oi a pair of posts, means rigidly supporting said posts in upright position, a air oit spool cups, means detachably hol ing each ot said cups to a part of the machine in upright position, each cup having a base plate provided with an aperture through which one of said posts extends, a pair of toothed rotary driving members arranged under the ciips to rotate about the posts, a pair of resilient longitudinally divided tubular spool holders affixed to the driving members and surrounding` the posts, a pair of ribbon spools frictionally held on said resilient holders, said holders and "driving members being loosely mountedy on the posts and said driving members beine, of larger diameter than the apertures in the base plates of the cups and cooperating with said base plates to prevent accidental disconnection of the spool holders and spools from the posts in handling the machine, and means for rotating the toothed driving members.

7. In a typewriting machine, the combination with an inking ribbon having abutments near its ends and a pair of spools with which the ends of the ribbon are connected, of a universal key-operated vibrating member, a pair of driving Worms, shafts on which said worms are fixed, ratcliets on said shafts, pawls on said key-operated member for rotating the ratchets, a pair of worm gears, reversing means operable by said key-operated member for shifting the Worm. gears axially simultaneously in opposite` directions to connect one worm gear with its driving worm and disconnect the other gear from its driving worm, stationary posts slidably and rotatably supporting the worm gears, means for connecting the spools to rotate with the worm gears and more axially therewith, and means operable by the ribbon abutmeuts for establishing operative connection between the key-operated member and the reversing means.

8. ln a typewriting machine, the combination with an linking ribbon having abutments near its ends and a' pair oi spools with which the ends of the ribbon are connected, of a universal key-operated vibrating member, a pair of driving Worms, shafts on which said worms are fixed, ratchets on said shafts, pawls on said key-operated member for rotating the ratchets, a air of worm gears, stationary posts supporting the worm gears for rotary and axial movements, means connecting the spools to move with the worm gears, a pair of reversing levers, a link connecting said levers, a. pair of swinging 4gear shitters having cam surfaces engaged by the reversing levers to shift the worm gears'simultaneously in opposite di-ll rections, and trip devices shitably mounted on the reversing levers movable by the ribbon abutments alternately into the path of vmovement of said key-operated member.

9. in a typewritin machine, the combination of a folding p aten carriage support, avertically movable case shift frame carrying said support, a pair of horizontally disposed brackets secured to the carriage sup-.5 port at their rear 'ends at opposite sides of the machine and provided with upstanding vcup-sup orting lugs, a pair of s ool-cu s detacha ly held to said lugs above t e brac ets and having base plates provided with central apertures, a pair of vertical posts rigidly held at their lower lends to said brackets and extending through the apertures in the base lates of the cups, a pair of horizontally disposed bell-crank reversing levers under the cups pivoted on the brackets to swing about vertical axes and cach having an arm extending fore and aft .of the machine and an arm extending transversely of the machine, a transverse link lconnecting the fore-and-at'extending lever arms, a pair of tubular spool holders loosely mounted on the osts, a pair ottoothed rotary drivingmem rs located between the reversing levers and cups and fixed on the spool holders, said osts having shoulders supportin the driving members above the levers an said members being of greater diameter than the a ertures in the cup base plates, a. pair of riving-member turnin evices mounted on the brackets, universe key-operated means `for actuating said devices. vwhenthe folding carriage support is k,in normal position, a pair of upstanding gaging a trip device shifted to active position andmoving the same fore-andaif`t of the machine to simultaneously rock the rewersing levers in opposite directions, each of said levers o erating when moved in one di rection to e ect relative movement between the adjacent rotary driving member and its turning device to operatively connect the same and operating when moved in the opposite direction to disconnect said member and device.

l0. In a typewriting. machine, the come bination of a iframe, a platen carriage 'mounted on the frame, brackets held to said trame forward of the carriage', upstanding posts on said brackets, worm shafts jour nailed in said brackets and extending transversely of the frame, worms on said shafts, ratchets on said shafts, worm gears slidably and rotatably mounted on the lower ends of said posts, upstanding spool-holding means carried by said gears, gear-shifting yokes str addling the vposts' under the worm gears and pivotally held to the worm shafts, horizontally swinging bell-crank reversing levers pivotally held to said brackets having rearwardly extending arms and inwardly extending arms overhanging the frame, a link connecting the rearwardly extending lever arms, cams on the yokes engaged by the inwardly extending arms of the bellcrank levers to rock the yokes, upstanding trip levers pivotally held to the inwardly extending arms ofthe bell-crank levers to swing transversely of the frame, a forwardly vand rearwardly swinging universal rocking engaging the trip levers, spools on the spoolholding means, and a ribbon connected with the'spools having abutments near its ends for swinging first one and then the other trip lever into the path of movement of its associated hook.

11. In a typewriting machine, the combination of printing keys, a pair of worms, means operable by the rintingkeys for turning1 said worms during the return or upwar stroke only of each key, a pair of stationary (posts su ported at one/side of the worms an exten ing transversely of the Worms, a pair of worm gears slidably and rotatably mounted on the posts, a pair of spool holders aflixed'to said gears, a pair of ribbons spools on the holders, an inked ribmessage bon connected at its ends with said spools, reversing means operable by said key-op erated means on the down stroke only ot a printing key upon exhaustion ot the ribbon from either spool to shift the two worm gears together with the spool holders and spools thereon in opposite directions to carry the worm gear associated with the empty spool into mesh with the adjacent worm and carry the other worm gear out ot mesh with the other worm, and a pair of trip devices movable alternately by thev ribbon into' position to temporarily connect said reversing means `with said key-operated means.

12. ln an automatic directionreversing feed mechanism tor inked ribbons of typewritin'g machines, the combination of two driving worms, means for rotating said Worms uponv actuation of the keysot the machine, `two stationary posts mounted at one side of the worms and arranged trans versely et the axes of the worms, two worm gears slidably and rotatably mounted on the posts, two axially arranged spool-holders carried by the worm gears to slide and ro tate therewith, two spools on the spoolholders, an inked ribbon connected at its ends to`the spools, and ribbon-controlled means operable by a part ot said driving worm rotating means upon exhaustion of the ribbon from either spool to shift the worm gear associated with the empty spool along its supporting post into mesh with its driving worm and shitting the other worm gear along its supporting post out of mesh with its driving worm.

13. ln a typewriting machine, the combination of an upstanding rocking trame pivotally supported to swing fore-and-aft ot the machine, a pair of hooks held to said trame at opposite sides of the machine to move tore-and-aft therewith, printing key levers, a universal bar operable by said key levers and connected with the frame to roc said frame, a pair of toothed rotary vspoolu driving members, a pair of ribbon spools driven by said members, a ribbon connected to said spools having abutments near its ends, a pair ot driving member turning devices operable by said rocking frame, a pair of horizontally disposed bell-crank levers jivotally supported to swing about vertical axes at opposite sides of the machine and each having an arm extending fore-and-aft ol" the machine and an arm extending trans-Y versely ot the machine, a transverse-:link connecting the fore-and-aft extending lever arms, and a pair of upstanding trip devices-pivotally supported on the transverse arms ot the levers to swing transversely oit the machine and each movable by one of the ribbon abutments from a normal position out of the path of the adjacent hook to a position in the path ot said hook to effect simultaneous swinging movements of the bell-crank levers in opposite directions, each ot said levers operating when moved in one direction to effect relative movement between the adjacent driving member and its associatcdv turning device to connect the same and operating when moved in the opposite direction to disconnect the driving nienibetI and turning device.

14. ln a typewriting machine, the combination ot an upstanding rocking frame pivotally supported to swing fore and att ot the machine, a pair ot' hooks held to said frame at` opposite sides ot the machine to move tore-and-att therewith, printing key levers, a universal bar operable by said key levers and connected with the trame to rock said `trame, a pair of toothed rotary spooldriving members, a pair of ribbon spools driven by said members, a ribbon connected to said spools having abutments near its ends, a pair of driving-member turning -devices operable by said rocking trame', a pair of horizontally disposed bell-crank levers pivotally supported to swing about vertical axes at opposite sides ot the machine and each having an arm extending fore-andatt ot the machine. and an arm extending transversely of the machine, a transverse link connecting the fore and att extending lever arms, and a pair of upstanding trip devices pivotally supported on the transverse arms of the levers to swing transversely ot the machine and each movable by one ot the ribbon abutments from a normal position out of the path of the adjacent hook to a position in the path of said hook to effect simultaneous swinging movements of the bell-crank levers in opposite directions, each of said-levers operating when moved in one direction to eect relative movement between the adjacent driving member and its associated turning device to connect theY same and operating when moved in the opposite direction to disconnect the driving member and turning device, said hooks being effective to move an active trip device only on the down stroke of a printing key and said turning devices operating to rotate the toothed driving members only on the upward strokes of the printing keys.

l5. in a typewriting machine, the combination of an upstanding rocking frame pivotally supporte-d to swing fore-and-aft of the machine, a pair of hooks held to said ltrame at opposite sides ot the machine to move fore-and-at't therewith, printing key levers, a universal barl operable by said keylevers andiconnected with the frame to rock said frame, a pair of toothed rotary spooldriving members, a pair tot ribbon spools driven by said members, a ribbon connected to said spools having abutments near its ends, al pair ot driving-member turning devices operable by said rocking frame, a pair of horizontally disposed bell-crank levers pivotally supported to swing about vertical axes at opposite sides of the machine and eachhaving an arm extending fore-and-aft of the machine and an arm extending transversely of the maehine, a transverse link connecting the fore and att extendinglever arms, and a pair ot npstanding trip devices pivot-ally Supported on the transverse arms of the levers to swing transversely of the machine and each movable by one of the ribbon abutments from a normal position out of the path of the adjacent hook to a position in the path of said hook to effect simultaneous swinging movements of the bell-crank levers in opposite directions, each of said levers operating when moved in one direction to effect relative movement between the adjacent driving member and `its -associated turning device to (onnect the same and operating` when moved in the opposite direction to disconnect the driving member and turning device, said trip devices and said bell-crank levens being so arranged that swinging movement of each trip device about its pivot is limited in both directions by the bell-crank lever carrying the trip device.

16. In a typewriting machine, the combination of an upstanding rocking frame for arresting the trip devices in normal inactive position, and weights rigidly afiixed to said trip devices for restoring the same to normal position after reversal of the ribbon feed.

17. In a typewriting machine, the cornbination oi' an upstanding rocking frame pivotally supported to swing fore-and-aft of the machine, a pair of hooks held to said trame at opposite sides of the machine to move fore-and-aft therewith, printing key levers, a universal bar operable by said ke levers and connectedv with the frame to roei said Jframe, a pair of toothed rotary spooldriving members, a pair of ribbon spools -driven by said members, a ribbon connected pivot-ally supjnn'ted'to swing fore and aft'.

et the machine, a pair of hooks held to said frame at opposite sides ot the machine to move fore-and-aft therewith, printing key levers, a universal bar operable by said'kiy r levers and connected with the frame to rock said frame, a pair ottoothed rotary spooldriving members, a pair of ribbon'spools driven by said members, a ribbon connected to said spools having abutments near its ends, a pair of driving-member turning de.- vices operable by said rockingr frame, a pair ot' horizontally disposed bell-crank levers pivotally .supported to swing about vertical axes at opposite sides of the machine and each having an arm extending fore-and-aft et the machine and an arm extending transversely of thel machine, a transverse link connecting the tore-and-aft extendingvlever arms, anda pair of upstanding trip devices pivot-ally supported on the transverse arms of the levers to swing transversely of the machine and each movable by one of the ribbon abutments from a normal position out of the path of the adjacent hook toa position in the path of said hook to effect simultaneous swinging movement of the. bell-crank levers in opposite directions, each of said levers operating when moved in one direction to etiect relative movement between the adjacent driving member and its associated turning device to connect the same and operating when moved in the opposite direction to disconnect the driving member and turning device, said bell-granlrlevers and trip devices having abutting portions to said spools having abutments near its ends, a pair of driving-member turning devices operable by said rocking frame, a pair of horizontally disposed bell-crank levers pivotally supported to swing about vertical axes at, opposite sides of the' machine and each having an arm extending fore-and-aft ot the machine and an arm extending transversely ot the machine, a transverse link connecting the 'ore-and-aft extending lever arms, and a pair of opstanding trip devices pvotally supported on the transverse arms ot the levers to swing transversely of the machinel and each movable by one of the ribbon abutments from a normal position out ot' the Vpath of ,the adjacent hook to a position in the path of said hook to etiect simultaneous swinging movement of the bell-crank levers in opposite directions, each of said levers operating whenv moved in one directionv to effect relative movement between the adjacent driving member and its associated turning device to connect the same and operating when moved in the op posite direction to disconnect the driving member and turning device, said bell-crank levers and trip devices having abutting portions tor arresting the trip devices in normal inactive position, and weights rigidly aixed to said trip devices for restoring the same to normal position after reversal of the ribbon feed, said weights being arranged to engage the levers to'limit movement of the trip devices away from normal position.

18. In a .typewriting machine, the combination ot an upstanding rocking frame pfvotallv supported to swing fore-and-aft of the machine, a pair of hooks held to said trame at opposite sides of the machine to move fore and aft therewith, printing key levers, a universal har operable by said key levers and connected with the frame to rock of horizontally disposed bell-crank levers waaien vpivotally supported to swing about vertical axes at opposite sides et the machine and cach having` an arm extending fore-and-att ot the machine and an arm extending transversely of the machine, a transverse link connecting the fore-and-aft extending lever arms, and a pair of upstanding trip devices pivotally supported on the transverse arms of the levers to swing transversely of the machine and each movable by one'of the ribbon abutments from a normal position out et the path of the adjacent hook to a position in the path of said hook to edect simultaneous swinging movementsv zoit the bell-crank levers iny opposite directions, and cam means operable by each lever toedect operative disconnection of the adjacent driving member and turning device or permit operative connection thereof.,

19., ln a typewriting machine, the combination of, a main frame, a platen carriage support shiftable kup and down to change case, a pair of brackets held to said support at their rear ends at opposite sides ot the machine, a pair of upstanding spool holders, a pair of horizontally disposed toothed rotary driving members alhxed to said holders and rotatably mounted on the brackets, a pair of ribbon spools held to said holders to rotate therewith, a pair of bell-crank levers pivotally held to the brackets to swing horizontally and each having an 'arm vextending fore and att of the machine and an arm ex tending transversely ot the machine, a transverse link connecting the fore-and-attextending lever arms, a key-operated rocking frame pivotally suported to swing tore-andatt of the machine, a pair of driving-member turning devices mounted on the brackets and both operatively connected with and simultaneously operable by said rocking frame in all case positions ot the platen cari riage support tor turning the driving members, a pair of hooks extending tore and att of the machine at opposite sides thereot and carried by said rocking frame, a pair of upstanding trip devices pivotally supported on the transverse lever arms to swing trans versely oit the machine, each ot' said trip devices having a ribbon guide at its upper end adapted to be engaged bv a ribbon abut ment and having a depending arm arranged to be engaged by and moved an equal distance in a general fore-and-att direction by the adjacent hook in all case positions of the carriage support when the device is rocked by a ribbon abutment, said levers operating upon movement ot a trip device by a hook to operatively disconnect one turning device and its associated driving member and operatively connect the other turning` device and its associated driving member,

20. ln a typewriting machine, the combil nation of a shittable platen carriage support lor changing the normal relation between the types and platen, a pair of ribbon spools rotatably mounted on the support, a pair of trip devices provided with ribbon guiding portions adapted to be engaged by ribbon abutments to shift the trip 'devices transversely or' the machine alternately from inactive to active position, a pair of reversing levers pivotally mounted on the support and upon each of which one of the trip devices is shiftably supported to move transversely of the machine, a link connecting the reversing levers, a universal bar on the main frame of the machine, means forming interruptible driving connections between the universal bar and said spools in all case positions of the support for rotating the spools, and

means operable by said universal bar tor en-v gaging an active trip device and moving the same fore-and-alt ot the machine in all case positions of the support, said levers operating upon movement ot a trip device by the universal bar to interrupt the driving connection between the universal bar and a full spool and establish a driving connection between the universal bar and an empty spool.

lln testimony whereof ll hereunto aiix my p signature.

U'lvl@ PETERNN.

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